Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
uni-essen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 11:32:15 UTC · ↺ Refresh
MX Hostnames
- mx-serv5.uni-due.de
- mx-serv4.uni-due.de
- mx-serv3.uni-due.de
MX Priorities
- mx-serv3.uni-due.de: 10
- mx-serv5.uni-due.de: 10
- mx-serv4.uni-due.de: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 134.91.50.12 ↩ mx-serv3.uni-duisburg-essen.de
- 134.91.50.16 ↩ mx-serv5.uni-duisburg-essen.de
- 134.91.50.14 ↩ mx-serv4.uni-due.de
SOA Record
Raw SOA
ns1.uni-duisburg-essen.de netadm.uni-duisburg-essen.de 2025110902 14400 3600 1209600 10800
Primary NS (mname)
ns1.uni-duisburg-essen.de
Admin Email (rname)
netadm@uni-duisburg-essen.de
Serial
2025110902
Refresh
14400s
Retry
3600s
Expire
1209600s
Minimum TTL
10800s
Nameservers (NS)
dns-2.dfn.de
ns2.uni-duisburg-essen.de
ns1.uni-duisburg-essen.de
SPF Record
✓ Soft Fail (~all)
v=spf1 include:uni-due.de ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- google-site-verification=ao6bsU-PynQ0nGziXEU2rkcGKh1_DBnALmHLmdZv6uo
- SPFv=spf1 include:uni-due.de ~all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for uni-essen.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits